Article Figures & Data

Figures

Typical evolution of a hemorrhagic CM on MR imaging with time. Row 1, A hemorrhagic CM in the pons at the time of acute focal symptoms. MR imaging demonstrates subacute hemorrhage with increased T1 and T2 signal, with surrounding edema on FLAIR. In this patient, there was no enhancement of the lesion. DWI and ADC maps demonstrate low signal intensity. Rows 2 and 3, The evolution of the lesion 1 and 8 months later, respectively. The edema is reduced by 1 month and absent at 8 months. The lesion decreases in size, but there remains an increased T1 signal. DWI remains low signal intensity throughout. The ADC map demonstrates low or mixed intensity by 8 months.

Radiologic evolution of hemorrhagic cavernous malformations. Row 1, An acute hemorrhage into a medullary cavernous malformation with surrounding FLAIR hyperintensity. There is a small developmental venous anomaly on contrast imaging. A follow-up MR imaging (row 2) was performed 3 months later. The cavernous malformation has evolved from a Zabramski type I to type III lesion. There is no persistent edema, and the ADC and DWI demonstrate hypointensity.